(Oops, this was meant to be in reply to Re^2: Display file size during download, but it's fine here.)

I don't know. It works for me. For example, the following shows "0 of 10KB at 0.0KB/sec; 02:45:45 remain".

#!/usr/bin/perl

$|=1;

print "Content-Type: application/octet-stream\n";
print "Content-Length: 10000\n";
print "\n";

for (1..10000) {
   print('a');
   sleep(1);
}
[download]

Does it work for you?

The autoflush is not necessary, but the browser needs to be able to see the header before it can display progress. For example, the following also works for me.

#!/usr/bin/perl

print "Content-Type: application/octet-stream\n";
print "Content-Length: 100000\n";
print "\n";

for (1..20) {
   print('a' x 5000);
   sleep(10);
}
[download]

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